#!/bin/bash

#
# Copyright 2019 Mani Sarkar
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

set -e
set -u
set -o pipefail

if [[ -z ${DOCKER_USER_NAME:-""} ]]; then
  read -p "Docker username (must exist on Docker Hub): " DOCKER_USER_NAME
fi

IMAGE_NAME=${IMAGE_NAME:-zeppelin}
IMAGE_VERSION=${IMAGE_VERSION:-$(cat version.txt)}
DOCKER_FULL_TAG_NAME="${DOCKER_USER_NAME}/${IMAGE_NAME}"

findImage() {
    IMAGE_NAME=$1
    echo $(docker images ${IMAGE_NAME} -q | head -n1 || true)
}

IMAGE_FOUND="$(findImage ${DOCKER_USER_NAME}/${IMAGE_NAME})"
if [[ -z "${IMAGE_FOUND}" ]]; then
    echo "Docker image '${DOCKER_USER_NAME}/${IMAGE_NAME}' not found in the local repository"
    IMAGE_FOUND="$(findImage ${IMAGE_NAME})"
    if [[ -z "${IMAGE_FOUND}" ]]; then
        echo "Docker image '${IMAGE_NAME}' not found in the local repository"
        exit 1
    else
        echo "Docker image '${IMAGE_NAME}' found in the local repository"
    fi
else
    echo "Docker image '${DOCKER_USER_NAME}/${IMAGE_NAME}' found in the local repository"
fi

docker tag ${IMAGE_FOUND} ${DOCKER_FULL_TAG_NAME}:${IMAGE_VERSION}
docker login --username=${DOCKER_USER_NAME}
docker push ${DOCKER_FULL_TAG_NAME}
